Four-Mirror Kaleidoscope

The precise positioning of the mirrors in the square creates quadruple symmetry.

Samples of gas emission spectra

Pure samples of hydrogen, nitrogen, and five noble gases are exposed to the high-frequency pulsed field of a miniature Tesla coil. Each gas has a characteristic breakdown voltage and emission spectrum.

A simple and clear demonstration of the recoil force.

The copper ball becomes smaller as it cools.

Glass is a very strong but brittle material

Even too strong glass has a weak point, and you can force its brittleness.

Deionized water💧

If electrodes are placed in the beakers and high voltage is applied to them, the deionized water forms a stable cylindrical bridge between the two beakers.

A visual demonstration of the effect of chimney draught.

A visual demonstration of the Magnus effect.

Needed:

- round, tall glass container;
- glycerin;
- small bottle that fits inside the container.

Fill the bottle with glycerin, place it in a glass container also filled with glycerin, and you will see the bottle literally disappear before your eyes.

The electromagnet on the crane moving the ferromagnetic scrap.

A macro shot of the molten metal.

What happens if you put a bath bomb in a vacuum chamber

A fascinating tabletop kinetic stepper motor sculpture.

LED when immersed in liquid nitrogen changes its color

The width of the band gap changes with temperature, so the electroluminescence wavelength shifts.

Jetpack for underwater swimming 💧

$2,800 price

The difference between an orthopedic insole and a regular one.

What happens if you unscrew the knob sharply in weightlessness.

Quicksand is a highly dangerous phenomenon.

You can get caught in them quite unexpectedly. All over the world there are beaches that turn into a risk zone at high tide. In the summer you want to take a walk on the yellow sand, and it suddenly begins to fall through and grab your feet.

And you have no way to get out. Panic sets in!

High-speed video of oyster mushroom and shiitake spore distribution

Scientists have discovered that the mushrooms create their own airflow to carry the spores by releasing water vapor. This causes the air to cool, creating a convective movement.

Simple unipolar motor.